How interpreters for programming languages are made. Do they need another programming language?

Question

How interpreters for programming languages are made.
I want to know that how people make their programming language and we use it.

Answer 1

Compliers and Interpreters are often written in the langauge they are compiling.

Also they are often written in low level lanagauges such as C, to increase the speed of interpreting and Compiling.